BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Speed and Distance

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Senior | Next Rank: 100 Posts
Posts: 51
Joined: Mon May 10, 2010 11:55 pm
Thanked: 4 times

Speed and Distance

by surajgarg » Mon Jul 19, 2010 10:29 am
Stephanie, Regine and Brian ran a 20 mile race. Stephanie and Regine's combined times exceeded Brian's time by exactly 2 hours. If nobody ran faster than 8 miles per hour, who could have won the race?

I. Stephanie II. Regine III. Brian

A. I only
B. II only
C. III only
D. I or II only
E. I, II or III

OA - D

Pls explain the solution to this.
Top
Source: — Problem Solving |
User avatar
GMAT Instructor
Posts: 1052
Joined: Fri May 21, 2010 1:30 am
Thanked: 335 times
Followed by:98 members

by Patrick_GMATFix » Mon Jul 19, 2010 11:14 am
https://www.beatthegmat.com/toughie-t60197.html
  • Ask me about tutoring.
Top
Senior | Next Rank: 100 Posts
Posts: 36
Joined: Tue Jun 22, 2010 6:52 am
Thanked: 1 times
GMAT Score:760

by Vipulvp » Tue Jul 20, 2010 5:48 am
surajgarg wrote:Stephanie, Regine and Brian ran a 20 mile race. Stephanie and Regine's combined times exceeded Brian's time by exactly 2 hours. If nobody ran faster than 8 miles per hour, who could have won the race?

I. Stephanie II. Regine III. Brian

A. I only
B. II only
C. III only
D. I or II only
E. I, II or III

OA - D

Pls explain the solution to this.
At least in this case, some trial-error could lead to a quick solution. 20 is a number with few factors. Add to it the constraint that speed can't exceed 8 mph for anybody. So, we're left with 2, 2.5, 4, 5 and 8. I tried for about two minutes before stumbling on to this combination: Brian - 2 mph; Stephanie - 2.5 mph; Reggie - 5 mph; The other combination could have values for S and R reversed. In either case the given condition of S's and R's combined time exceeding Brian's time by 2 hrs is satisfied. Only Stephanie or Regine could win. .[spoiler]Hence (D)[/spoiler].
Top
Legendary Member
Posts: 537
Joined: Fri Jan 22, 2010 10:06 pm
Thanked: 14 times
Followed by:1 members

by frank1 » Tue Jul 20, 2010 7:14 am
well at first i was puzzled ....how one among S or R can win and another cannot as both have same features

but actual thing was
Stephenie and Brain could win only...
but it is not in choice S and R can win is the best available option
GMAT score is equally counted as your GPA and 78 clicks can change you life.
Top
Post new topic Post Reply
• Page 1 of 1